TrueCrypt (http://www.truecrypt.org/) is a popular free on-the-fly disk encryption software that can encrypt files, partitions, whole disks and even a windows installation. It is an extremely useful and important tool if you wish to keep personal and confidential data from being accessed by unauthorized people. TrueCrypt even supports plausible deniability, allowing you to hide an encrypted volume inside another volume. TrueCrypt volumes are indistinguishable from random data, so an adversary cannot prove that you have a TrueCrypt volume hidden inside a dummy encrypted volume.
Unfortunately, the TrueCrypt website only provides binaries for Ubuntu and OpenSuSE, so for those of us running other distros, the only option is to compile from source. The steps below outline the installation procedure on a Fedora 9 machine.
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